Switch frog



July 15', 1 924. 1,501,822

J. P. SWIFT SWITCH FROG Filed April 21. 1924 Patented July 15, 1924.

UNETEELTE send b JAMES P. SWIFT, Z5 MILLSTONE, KENTUCKY.

SWITCH FROG.

Application filed April 21, 1924.

T0 (1 '10]! am it may concern:

Be it known that 1, JAMES P. Swrr'r, a citizen of the United States, residing at Millstone. in the ctmnty of Letcher and State of Kentucky, have invented certain new and useful Improvements in a Switch Frog, of which the following is a specification.

This invention relates to railway switch frogs and it consists in the novel features hereinafter descibed and claimed.

An object of the invention is to provide a two-piece frog structure adapted to be used at a switch in a railway track and which will dispense with the use of guard rails at such points.

With the above objects in view, the frog structure includes a body plate having intersecting wheel flange ways channeled therein. These flange ways intersect each other approximately at one edge of the body plate. A tongue is pivoted upon the body plate at a point between the edges thereof and between the flange ways. The said tongue is provided with converging flange ways which are spaced from each other at their opposite ends. The flange ways upon the tongues are adapted to be brought in alignment with the flange ways in the body plate when the tongue is turned upon the body plate. The body plate is provided with a recess in which the tongue is located and the upper surface of the tongue lies in the same plane as that in which the upper surface of the body plate lies. The body plate is provided at the bottom wall of the recess with an arcuate slot and a stud is mounted upon the tongue and passes through said slot. An operating bridle bar is connected with the said stud in a usual manner.

In the accompanying drawing Figure 1 is a top plan view of the switch frog structure.

Figure 2 is a transverse sectional view thereof cut on the line 2-2 of Figure 1.

Figure 3 is a fragmentary sectional view thereof cut on the line 3-3 of Figure 1.

The switch frog structure comprises a body plate 1 having wheel flange grooves 2 and 3 channeled in the upper surface thereof. These grooves are disposed at an angle to each other and substantially intersect each other at one of the edges of the plate 1. The plate 1 is provided at its upper portion with a recess 42 which is located between the Serial No. 707,942.

ends of the flange grooves 2 and 3. A tongue 5 is mounted upon a pivot 6 which is located in the recess 4, the tongue 5 is provided at its upper side with wheel flange grooves 7 and 8 which are channeled in the said tongue. The bottom wall of the said recess at is provided with an arcuate slot 9 which is concentric with relation to the pivot 6. The tongue 5 carries at its lower side a stud 10 which passes through the slot 9. A bridle bar 11 is pivoted at'one'end to the stud 10 and may be operatively connected in any suitable manner with aswitch stand (not shown). The grooves 7 and 8 in the tongue are spaced from each other at the opposite edges of the said tongue and beyond the outer sides of the grooves 7 and 8 the tongue is extended forming tread portions 12 adapted to be brought in alignment with the edges of the grooves 2 and 3 in the body plate 1, when the tongue 5 is swung upon its pivot.

From the above description taken in conjunction with the accompanying drawing it will be seen that when the tongue 5 is positioned in the recess 'I so as to bring its groove 8 in alignment with the groove 3 the said grooves will form a continuous flange groove for receiving the flanges of the wheels that pass over the frog structure and that the wheels which pass along the aligned grooves 3 and 8 will move upon one of the portions 12 of the tongue whereby the tread surfaces for the wheels is practically continuous. The same relation of the other portions 12 with respect to the grooves 2 and 7 when the said grooves are brought into alignment will take place.

Having thus described the invention, what I claim is A switch frog structure comprising a body plate having angularly disposed grooves channeled in the upper surfaces thereof, the said body plate being provided with a re cess located between the ends of the grooves, a tongue pivoted in the recess and having converging grooves adapted to be moved in alignment with the grooves in the body plate, said body plate being provided at its ends and at the sides of the grooves therein with extensions adapted to be aligned with the side edges of the grooves in the body plate.

In testimony whereof I aiiix my signature.

JAMES P. SWIFT. 

